Bending-machine



(No Model.) 3 Sheets-Sheet 1. M. KENNEDY.

BENDING MAGHINE.

No. 360,098. Patented Mar. 29, 1887.

EWIUMIIUIIWIWWEH ENW8MWWIlmlllllllllllllliii IIINIW W jlilmllltllWIWMIHII (No Model.) 3 Sheets-Sheet 3. M. KENNEDY.

BENDING MACHINE.

No. 360,098. Patented Mar. 29, 1887.

wm ea. JzwnW/ ZZ WAW MARTIN KENNEDY, OF HEGEIVISOH, ILLINOIS.

BENDlNG-MACl-HNE.

SPECIFICATION forming part of Letters Patent No. 360,098, dated March29, 1887.

Application filed August 3, 1886.

T0 at whom it may concern:

Be it known that I, hIARTIN KENNEDY, of Hegewisch, in the county ofCook, State of Illinois, have invented certain new and usefulImprovements in Bending-Machines, of which the following is aspecification.

The object of my invention is the production of a machine which shall becapable of bending a great variety of shapes, such as are nearly orquite without the range of those machines using rigid formers or dies.

My invention consists in a novel combination of fixed with yielding diesand their associated parts, so constructed that a variety of dies may beused, of any desirable shape, and having various relations of movementsto each other; and my invention consists, further, of various novelcombinations, hereinafter described.

By providing wide tableroom between guiding-flanges for the movabledies, and by constructing the latter in the peculiar manner illustratedin the drawings and making them of considerable width, and the dieproper detachable from its vibrating or reciprocating arms, a largernumber of varying shapes may be produced by my improved machine than ispossible by the bending-machines now in use.

In the drawings, Figure 1 is a plan View of the complete machine withbending-dies open. Fig. 2 is a similar View showing the bendingdiesclosed. Fig. 3 is a longitudinal section. Fig. 4 is a cross-section ona: as, Fig. 2, as seen from above. Figs. 5, 6, 7, 8, and 9 are variousshapes which may be produced by the machine.

A, Fig. 1, is the bed or frame. Upon it are secured the table 0 and theupright frames B B, carrying the driving-gearing. On the upper face otthe frame slides the gibbed crosshead E E, the front half being boltedto the back half, E, the latter, together with the driving-gear andframe, being a well-known means for driving various special devices forcutting, punching, or forging, as well as for bending. The frontportion, E, of the crosshead is slotted vertically for the reception ofthe sliding blocks J J, having pinsjj, on which are pivoted the arms HH. The blocks J J are adjusted by the screws G G. The points Serial No.109,759. (No model.)

of the screws are grooved and extend into the blocks J J, and are heldby pins crossing the ends of the screws and projecting into the grooves.The front portion of the cross-head is also slotted horizontally toallow the movement of the arms H H therein. The arms H H carry the diesD D, having an outline at d d, corresponding, when closed, to theexterior of the shape to be produced.

K is the stationary die, held in place by the pins 7: It.

Dies of other shapes may be readily substituted for the movable andfixed dies herein shown and described, as desired.

L L are guide-flanges bolted to the table 0,

and are adjustable by the set-screws N passing through the flange M.

Rolls 0 O diminish the friction between the arms H H and flanges L L.

Rolls Q Q perform the first bending of long bars, thereby preserving thedies; but these rolls are not essential.

I I are spiral springs, whose function is obvious.

P is a removable plug set loosely in a slot in the table O.

R represents the bar or blank to be bent.

T T are screws passing through raised portions U U of the bed-plate andabutting against the table 0.

The operation is as follows: The machine being in the position shown inFig. 1, the heated bar or blank is placed between the plug 1? and die K,there being just space enough between them to easily allow suchinsertion. In some work the plug P may be omitted without detriment. Onstarting the machine the cross-head advances, and this motion, combiuedwith the closing of the dies D D by the action of the rolls on theguides L L, brings the bar to the shape of the dies, as shown in Fig. 2.The revolution of the gearing is continued until the machine resumes itsoriginal position in readiness for the next bar. All that is requiredfor the practice of my invention in this regard is that the cross-headshould be actuated by a reciprocating device. The

loose-fitting plug Iis especially of use in bending shapes like Fig. 5,the tendency of the bar being to assume the shape shown by the dottedoutlines in said figure. As there must be sufficient space between theplug P and the stationary die K to allow the easy insertion of the bar,this tendency would not be entirely overcome by a tightly-fitting plug;but the thickness of the plug is so calculated that as the cross-headapproaches the position shown in Fig. 2 it comes in contact with theplug, thereby forcing the bar R closely against the die K.

It is desirable, though not essential, that in operation the cross-headface should operate upon the plug 1?. The cross-head may, however, becut away so as not to come in contact with the plug P, which in thiscase should fit snugly, instead of loosely, in the bed-plate C. It isalso evident that in machines intended for producing but one shape thevibrating arms and the dies may be constructed as one.

It is evident that the table and the crosshead are in a mannerinterchangeable, in that either may be made movable, the other beingstationary.

It is not essential that the extremities of the dies should travel in astraight line. For making some shapes it may be desirable to curve theface of the flanges L L; or a lever or system of 1evers-such as are wellknown substitutes for guide-bars in producing curved or rectilinearmotion-may be pivoted to the table and to the dies as. substitutes forthe guide-flanges L L.

I claim 1. In a bending or shaping machine, vibrating arms adj ustablyconnected with the crosshead and carrying the detachable dies D, incombination with guides which determine the motion of the moving dies,the dies D D being constructed and arranged substantially as shown anddescribed.

2. In a bending or shaping machine, the combination of a cross-head withthe loosely-fitting plug, the stationary die, and movable dies,substantially as shown and described.

3. In a bending or shaping machine, the combination of the vibratingarms carrying the moving dies, and the guides which determine the motionof the moving dies, the fixed die K, and the removable plug 1?, forholding and shaping the central portion of the blank, constructed andcombined to operate substan tially as described.

4. In a bending or shaping machine, vibrating arms adj ustably pivotedto the reciprocating cross-head by the sliding block J, the pin j, andthe screw G, in combination with adjustable guides which determine themotion of said dies.

5. In a bendingmachine, the combination of the crQsshead, the adjustablevibrating arms and dies H D, the plug P, the stationary die K, and theguides, .all constructed substantially as shown and described.

' MARTIN KENNEDY.

Witnesses:

P. H. T. MAsoN, J. I. VEEDER.

